which template for the summary posts landing page

Starting to feel very inadequate.

Whereas I am almost on top of everything else with 2024, having put together a couple of other sites with it – despite trying and trying – I get no closer to understanding how to identify which template or page controls the way the ‘blog’ (posts) summary and landing page present my posts.

https://philipchudy.com/w/ shows a page I must have blindly customized at some stage. I can no longer identify which template or page that is.

That page is unspeakably uninteresting and uninviting and must be changed.

I would prefer it to show a continuous stream of posts one above each other – as per default in 2012.

Presumably that means including some block component into the appropriate page/template.

What kind of a block/component should I chose for that?

Appreciate any pointers explanations or suggestions.

The page I need help with: [log in to see the link]